{
  "manageEntity": {
    "action": "Save",
    "entityId": "1719274421",
    "entityType": "Track",
    "nonce": "0x4595fb02e7c03b0f1e74d51fb65099468d4fa0de66d13692716952b670c64426",
    "signature": "0x3d8fce101292ecc7d495ab524fade5ed98ce92a7f0d4c1d5bd5c1e4f0029174504be3b38092ae30a42423798e757c7854c5ffc345b50c22339f7b4be5a6dfeb51c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}