{
  "manageEntity": {
    "action": "Save",
    "entityId": "1185882930",
    "entityType": "Track",
    "nonce": "0xf1c090eb5c59c3319fdd6f39b2adbe87b6c0762cb45dcbd7039fc1de507583de",
    "signature": "0x71a7cdb13d2abe6aed23e0a6eb7f34d49c820ec96df45212c3f4d50a28165af939c0395cd570264e9e46fe146ee47ce0a3e31c58391a60f5fa49b8363f1a0aae1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}