{
  "manageEntity": {
    "action": "Save",
    "entityId": "81500978",
    "entityType": "Track",
    "nonce": "0x6a960f2ffb839f9a6d9a32a0d0e6b5daf4a301775b7cc85542459a79de5d58d0",
    "signature": "0x97c613349bcec8e6e0872bbab7ec246d34e5b6068cd1918b820d6f5f021c3a047123ebc873f50aa6cdec5068f65eb65bc93be0d99b5508409ea271f1a4db35131b",
    "signer": "0xE0525026F59D952AE2CDA2f28771796C2d7f7D97",
    "userId": "348332358"
  }
}