{
  "manageEntity": {
    "action": "Save",
    "entityId": "889178051",
    "entityType": "Track",
    "nonce": "0x26f0cf3c6ce06186ce5fdd8eba84e5c17209054db0477c1ee11c5bc1c4d3e1bd",
    "signature": "0x4441bc4df4315e45c05708cec60c442590ef7d05a5c005d378a27e4da583a4f92894901a911be847f1540d8892b41f69149c756dfdd5af2899d4e66c319a0c141b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}