{
  "manageEntity": {
    "action": "Save",
    "entityId": "253695810",
    "entityType": "Track",
    "nonce": "0x98fa5a5172157a871143e16aca891267384489c6ac65712c8271cbfd1671856e",
    "signature": "0xf8b0ec7b69eb332b7abe974734686711cd019804bddfbbd5f86751d34865301752cda8a2f0a3629424126fb3c803f5e66163811ddb0c793a92857cff2a3728461b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}