{
  "manageEntity": {
    "action": "Save",
    "entityId": "610654516",
    "entityType": "Track",
    "nonce": "0x0519834e97cc8582f878cc7edfb3536755cbdc2a448f6b59883ff2cd7ea10331",
    "signature": "0xbbe70362418f4887abd3d999bbdbbef6b46a65e877cae575e51b014e2f1e16ce28544efabc0c6d9bc913ff6a3c768f5dd209dcae067105159c09b9f22298787f1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}