{
  "manageEntity": {
    "action": "Save",
    "entityId": "2014821767",
    "entityType": "Track",
    "nonce": "0x784214f1bade8fd962b3fa4b36a9ec684097db4dee1ef9bb90279775f104e08b",
    "signature": "0xa109cd1dbeb1a9310c7a1a8cd7435515ff25da47ec06bc632ebd40c57cfbe5f16af3915e5efd967ce68f1a44c2185d93ad5cdca89e46cbcaa5521232025147391c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}