{
  "manageEntity": {
    "action": "Save",
    "entityId": "681981105",
    "entityType": "Track",
    "nonce": "0x380b6188b611dc8c998330d07066f311587586de658a0b9a2b8ae8f2e37b61d9",
    "signature": "0xb377a9f6e101cca001669c3f394fdf5651561659844ce52047895e7f7b30dff16e6718cfc9e9d61890acdf1ed746ca0d99e1cf792de19ae243e4a2be244594801b",
    "signer": "0xe9B3548997c57545A6352D16A021F6df1a01747f",
    "userId": "616597835"
  }
}