{
  "manageEntity": {
    "action": "Save",
    "entityId": "530123003",
    "entityType": "Track",
    "nonce": "0xce136f8785e30ef8a07126751cd1ed5111ebffd4cc40c6297c7bd04bc096d063",
    "signature": "0xae50aab753ed6650138eafd249c04e42e7f32d65c86bdfcf42427c173a8deb6218ffb8d54a9f55a1a4a06521b5199fad344c8f3ec1e0d5cafe1280bacd3f5efe1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}