{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030608845",
    "entityType": "Track",
    "nonce": "0x4d79c1b7194fe7d8fcdccdf08975f755e0dfd43a035081f7660fa9b9ba89df27",
    "signature": "0x5fc98169fe4ea13278ccb6cadd2f5aa45a7d0d69e6dfb657a5f1fe86191c13cf6c00f9925492d1ff922b3fb267af7ec4f16db735ade54db9853ed6d635b7f9971b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}