{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963402613",
    "entityType": "Track",
    "nonce": "0xbcfeca2c15b62ea995ccc3c51a589380afda65e162f55ba971d26f218b6e6e66",
    "signature": "0x07f299a996dea653a6bc0f751448f434cdb0d41ce293c7e16237ce0e15e6f7ac06a5b831839fd57f2126784f0201b5b1865f85515b63785b559b6cb875e2433a1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}