{
  "manageEntity": {
    "action": "Save",
    "entityId": "481364807",
    "entityType": "Track",
    "nonce": "1785875554450661587",
    "signature": "0x9aed7e0a1b907d77fe91ddfbe12bd87576c78dd6f9f118d1e240189365094d846bc060093c1ebf66de396da296941873b3747ee1e2c37030f40c08eff3f5243b1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}