{
  "manageEntity": {
    "action": "Save",
    "entityId": "624062",
    "entityType": "Track",
    "nonce": "0xbc654b46d5d7a364aaef32cd99d8076b46e1d9c3c4cca82de32e89dff926a686",
    "signature": "0x562f83db377d78b6dfb20eb40484e19de7e4ad7c4fea14398ade5f60785f970a72e94da738d24b8c2465b21036c104988a9b50fb741cecfd192896e3b9eaeac41b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}