{
  "manageEntity": {
    "action": "Save",
    "entityId": "933585587",
    "entityType": "Track",
    "nonce": "0x20c8d06af608f47bbfd7eced9535e24968b7a22866430ea765e549f2e149cd7a",
    "signature": "0xd90ce26b03ab523b649ac16fd24162176a24a38fc0290104460acf7dbbdef53b22b80e5035b8c58d048cf486be6945e899e303ea5198290c78ac3c50c2a7d3731b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}