{
  "manageEntity": {
    "action": "Save",
    "entityId": "353874440",
    "entityType": "Track",
    "nonce": "1794073056576432996",
    "signature": "0x0931eb415232fe241b8290aa6a63025e8113f50d0fd6f3dd3af97a896f0e24df46ade3074dbf67a096cdfc506213a58af29ac443711485c6a86ff1b4e599a0f51c",
    "signer": "0x7ceB1dbE9571217daB0355F45032B0C20C5Ef11c",
    "userId": "704148242"
  }
}