{
  "manageEntity": {
    "action": "Save",
    "entityId": "252568",
    "entityType": "Track",
    "nonce": "0x2075a4c781c9b21180da50f9ba1553ad7a7c6ab4a4508ffc4d2bd09a1d018469",
    "signature": "0xbf9a11a3f29dba65ae2833ec051f7b2ac4c8518fc8a847a811ba73a7ed9c281e59748b47a3ff9a461d22128a54fa01c457c6d9036dac07c047a68679e31fb1a01c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}