{
  "manageEntity": {
    "action": "Save",
    "entityId": "812744412",
    "entityType": "Track",
    "nonce": "0xdd54a711552236920192615b505671d833c6dde0d9889cfc41943927bd749fa8",
    "signature": "0xd801d82605bc662bd49af1d8bafb57ad72917345428bcc5a033ebf53765afc976b89b8c5824eca306554d9dac865a8e7a48266101471cd1a18e720db14b034cb1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}