{
  "manageEntity": {
    "action": "Save",
    "entityId": "1129904263",
    "entityType": "Track",
    "nonce": "0x3228dfe69b52cc1d2e32d50157030b7b89dfb9175b79fe75745e9bf9e78e69b6",
    "signature": "0x2850012a70e17188f4de310fdbff5c2193fbdedd88eb0baa1c20ca4cb0e179de64ca2b734dcc1a6d0ca2050656651f0561d551efc6577c56492e5d84f37673c31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}