{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042011263",
    "entityType": "Track",
    "nonce": "0xe1cbfa1f8e683ca9f5f07b1a20924c6e6a17e9d8e5f72d28a23f0c2ec4ee390a",
    "signature": "0xe7da6e33f6db376e8dbcd3fa9efe905a1d0ba384bd939ed8e493f0e9cddd0a251dc129c30144756032dba6d37cb27c1981d2e17da3edc7854599419a85993b3e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}