{
  "manageEntity": {
    "action": "Save",
    "entityId": "22218",
    "entityType": "Track",
    "nonce": "0x03850c581c18a805bf51a56c4bb12f6856cb0c5058d15b2ed4ef209131842796",
    "signature": "0xe8e0efab4827d0b797397d6a1078566b6ef5e917cee8d72f06c34dd8935eb4c129d45143cbb0c2a2d28284d537fbac81b7f0e12247d41c1249dfd0f040d56bf01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}