{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345543522",
    "entityType": "Track",
    "nonce": "0x81a93ca09aa17afcc96652e5627b25bf1ab15fef97d4443239dd4af79f9f99c6",
    "signature": "0x5b2d8dc4be85bbf39f979c6ff3576f8aa2e7c10f6018a68e9719fe4ba75b85146910906225f17d44bf448c4fc555b3198ab46fcd98823589be05f3232e390a7a1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}