{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210084910",
    "entityType": "Track",
    "nonce": "0x9fc2064c91fc25ff9bd1464e75bbf3115f356ec9a50077314855f360f83760eb",
    "signature": "0x297b4884bde04cc743a7ed408d9eeb26969c5264d83ed6aa85508a433735395c445b2555b138585fe36b35b187674a0bb8daef82c846d3a5b0befa7f9472cfeb1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}