{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984715771",
    "entityType": "Track",
    "nonce": "0x02eb430922f60df959de84ca5ef5d0f9523c5e95fc32e89e7b2f1d7597b240b3",
    "signature": "0xcf32996caa792c90d88f2cf3517989a57639881fd0933993dab9ba7da372571e3c74bcf29b1a2590529a4444b3594b871709ab2cb4cfe90e631fa822a89e83011b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}