{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078929714",
    "entityType": "Track",
    "nonce": "0x49b80e51b19b2c4ea9493ebbe1199e507e185af27620b4c79cc1f4c6ff87a5c1",
    "signature": "0x6ede11bca0f544cd2304c373f2e874366cc7b56ee8c5d2041ebdb6e0baca7af5041fab13655a63b55daae004165b118d0cbeb7ecc846424bf6ccf69c4c1082341c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}