{
  "manageEntity": {
    "action": "Save",
    "entityId": "1311814365",
    "entityType": "Track",
    "nonce": "0x8f65ed6bd6abdcc8869ccef8195202383c1041c3dba4eafb8052426931dfb0d9",
    "signature": "0xf42ebd9d5faf467d1558eeef6433af0cbc7b8ec9570ad4c98c8b77688aa50a8c2ab5ef3e91e8aee3ed9c37ed5f5f368bf27b617bc6a12fb1fa4f48bff7756e751b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}