{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256722275",
    "entityType": "Track",
    "nonce": "0x4dd84ffca254f5dbd9ba29d4706ec9d272388923b9f7848fcba89bd0e7002f1f",
    "signature": "0xd23aefcd16c26c60dd4fe0451d4983de63b758d52f829580409d4d93be073f9d3d728c733949b87dfb2604f8ce03a80474390ed19075bbcfb4feeb83ace16c801b",
    "signer": "0xe2b1dcE37383Da05C6DEcaeCeB1e76b1449f1711",
    "userId": "218728810"
  }
}