{
  "manageEntity": {
    "action": "Save",
    "entityId": "214772",
    "entityType": "Track",
    "nonce": "0x11bde8d15d50f2280870a1fb7e9002fa546f46c1a4197051a82866d69828adf2",
    "signature": "0x1e2a23dc53103ce8bb72fd52ae6cfd7bb986916c7d1b84ae2c5cba4149a48a8b668ece229173eec0fa903903297c5a84ba315a86a9140a9e3f853c0245afcf781b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}