{
  "manageEntity": {
    "action": "Save",
    "entityId": "571811361",
    "entityType": "Track",
    "nonce": "0xb7f8882fa3956425958227a8a2e212228104ad5d47a89ba95133ec544203563b",
    "signature": "0x1bd26212f3c0890023a24bd603499c44ca02f5854d9e65b141776cd7d7c048697072e3b191eee6f7135c672d2af731ccd93586ec9dd65a1a14031ca761d40d9c1b",
    "signer": "0xfBD2B2a59726b49e1d17c6691F6E33AC362664Eb",
    "userId": "173775879"
  }
}