{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801930125",
    "entityType": "Track",
    "nonce": "0xb64128b030b614ae84632d60eb6fcc084234b8b73fc3cf506a28fa0cf367fefa",
    "signature": "0xfbf41643b4bf69136238a7a76cfabc8987fe1b8814b67f6d4dcdd61eeccbe8193f83dbe1723d55d611a451741d6920d5be74ac1bfb3873d0409d01c0a80b97791c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}