{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807341478",
    "entityType": "Track",
    "nonce": "0xf2737a78982f04558e7e8ce2fa4ae982e062885eb238999076a17a5abd2cb2c4",
    "signature": "0x77856bd26e5d82ae7f2007151d74973e8448f0bf31f3fb2a8540836ce43fc30d4ba01d4257c00570c636cdc5002677e02f99f6ed6dbb9a768dec097440a2320c1c",
    "signer": "0xFA30F01c1d91A9d53bf670AC66212774B9cf6695",
    "userId": "612024327"
  }
}