{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605946302",
    "entityType": "Track",
    "nonce": "0xe8a62d81eeec5843f553ef9cf1a0ca0b47412052a651a1dadb282ac5d2e9dfcd",
    "signature": "0x9c3e0ac50887acee46a2ec452cdce7e591573e4a454ab230977cea56c868521b3dd95828314f3ef61584a12cd09c9406b65a1860a5e5c97f43b91cf4eb0776511b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}