{
  "manageEntity": {
    "action": "Save",
    "entityId": "3641060",
    "entityType": "Track",
    "nonce": "0x342d8e177a857ff3fea4cf25b7c8e06442cee451f4f2e47e46cf22121d544576",
    "signature": "0xbeea1b526abea7399c293d1150982618aa0d332b429304fd8f01d02bfd9a362f581d94b1d870c67ebb27d19c45168718218dd4455a128923d65fc946227f4d671c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}