{
  "manageEntity": {
    "action": "Save",
    "entityId": "1561034162",
    "entityType": "Track",
    "nonce": "1787905104617124476",
    "signature": "0x9567fc8ff2c978afc523f8443c9042cbb4ce82c3e0a1c080777494e5f9d7ad7e5f5d6b53f3451f52b498b980937565894052ec0a98ebb7873ac851939019d6b31b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}