{
  "manageEntity": {
    "action": "Save",
    "entityId": "131788679",
    "entityType": "Track",
    "nonce": "0x958ec3dd4dc94011f4e21b40d39b0f516d7d817b8c47281b89547e72e091f688",
    "signature": "0x2ff7980cfaf39f5d3a77112ee29b2d5de0dd48aca489534e5aa00995fd74d444329d4236919e2f253b1266c173505e955f5458c5bfa49d789a75aca5dbe8b9b91c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}