{
  "manageEntity": {
    "action": "Save",
    "entityId": "711142",
    "entityType": "Track",
    "nonce": "0xd7e79d0613ba0c501242883d2fbefa9f187e8845a16b02eca37216c18fc82c2c",
    "signature": "0x2af13122cc3d5e20463a721da6f90ccfac457d4cad0b977b4429be67f40011ea744c00089bd9ede4abd508472a686161bb410e60d69b444bf03a602bfa92c0961b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}