{
  "manageEntity": {
    "action": "Save",
    "entityId": "281540333",
    "entityType": "Track",
    "nonce": "0x67710dc007c345b6df60dda430f4cb6cf7ec32a4538dca92232161c4cb5d2d82",
    "signature": "0x89b3ce4f5f0e25372439e3aba15756786c7a250a3bf1665c1cdf44d53fb8ad0c368145283fd863462dbf1877a9c679971eb67069071bca98769e48e7339a3af81b",
    "signer": "0x97Ce19D122F5b51231cF4DBbd25Ac36CBDd6CACa",
    "userId": "426864186"
  }
}