{
  "manageEntity": {
    "action": "Save",
    "entityId": "562595",
    "entityType": "Track",
    "nonce": "0x4438c154396eada1945fe9385da0be0c6bcbbaf2fbd4308db7b081dee234c35d",
    "signature": "0x9e60ab8d2457d6f8a973304b1bb51b90f8429918906dc357593ebe5951567bac205e2c2d1068a80b6ec7586f04126a30d0e30a2589044cac337ab13edb7687fb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}