{
  "manageEntity": {
    "action": "Save",
    "entityId": "605254797",
    "entityType": "Track",
    "nonce": "0xdef345b888714ea310ab6ba9b5757ca7639cd27b126ba04e5ff64d663d7d2b20",
    "signature": "0xa8eee854eb5084754a37a8472371d67ff4e44fc4cff8f331ab2f24dd855cbe5d77bd883c4223179f3aca773d790d9aa2e34ae5e173fc9aee3a8c4b0341b88e8e1b",
    "signer": "0x5d8091c5439F52184dFD827f33FF815dCc827bA8",
    "userId": "52403052"
  }
}