{
  "manageEntity": {
    "action": "Save",
    "entityId": "736608573",
    "entityType": "Track",
    "nonce": "1788184883955188836",
    "signature": "0xde5f4d3432a599e4dabe8ec31128331f06cd503defcd55e86d4b61ce902f121a3635d443abf7c4b63d6d2f45ce48ed7443c0ce3c68773df0925184b88bffe3a11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}