{
  "manageEntity": {
    "action": "Save",
    "entityId": "2043540930",
    "entityType": "Track",
    "nonce": "0x7345076f448a7ab04b3bf6de2b390eaff525b45189b89f61d26de1e611a6d5a6",
    "signature": "0xbb794f8def101f83a486c36f21ada30395a67bcd5e9fdd9213599b24f7e43dbe1999822af9877954b89a781185158e1fcf493aaf780f6063a9bda2b99c6f2b4d1b",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}