{
  "manageEntity": {
    "action": "Save",
    "entityId": "428383",
    "entityType": "Track",
    "nonce": "0x1ec9aecced4c78999db34c2d9f0229325f63f26c7a40d51a8ab3a5ee0dde1162",
    "signature": "0x529b1a7b0cbde9592a51cb1aae4a8eeb356d7db27cdb17e4ff6bba695294e6cc4a0aa69ebb37d60c485e638118be8dfb9ebe6be283f1dd816a9178ad8e92c3b41b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}