{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264677403",
    "entityType": "Track",
    "nonce": "1793392848358478077",
    "signature": "0xac9e4567b70697d2b9b1536ce8367abf5968eb2d350f2b6ab794b7da73e9aabf7c87bbd9d137dfb733a6358d5416989ba57943e2329106fc3e2740482b2eaa821b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}