{
  "manageEntity": {
    "action": "Save",
    "entityId": "237999305",
    "entityType": "Track",
    "nonce": "0x2ac775f4bd76f2c6aafb56b8a164ca88be0359dc6c53a432683dc639ee8d480a",
    "signature": "0x2e8245c3abe96a56e6e037e0b826c85d7f8be7e9e5be74cfc8670fb0f2f686e9177bb87dc9b8469909c446b1c430909f343f1649555ea130bac25df20d6499561b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}