{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369074360",
    "entityType": "Track",
    "nonce": "0x18bc79dafd3643fc01d3a3e51b9db70e9eb3854d51c5f66f1379828d052d8403",
    "signature": "0x7606fa4741786c2133d9c11de878ffd6f6f2aa53c903310dd409c2bda712a45b2800c3a7da7a341e130ce8c66185d4983b3e89df01432e676bb0009f972d42c41c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}