{
  "manageEntity": {
    "action": "Save",
    "entityId": "252577",
    "entityType": "Track",
    "nonce": "0xb7bbe397edd707f374eea3c858242733931212d70896b8f951b51be772b2da07",
    "signature": "0x25fd45b9b359145e4da1824d86035ded4408832bb8d878748e1799aea315e867678bc7183df221040296ecb38127186d6b025b2c821d82d1d0604b73fb6c40e41c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}