{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488031754",
    "entityType": "Track",
    "nonce": "0x3e882339d518483f4123d65feb01f55956a6b479e5cbe098ce61da69bcd2caca",
    "signature": "0x47273766f2650eab043c728b2dc822d0532e4420b4672248a2b4ce493a41af220f3d695216b85ad89235276e7e4c80d31fd75b2e5c5e03be9ccdc1f3ea51980a1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}