{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057644667",
    "entityType": "Track",
    "nonce": "0xc1de8bb766435ea494a40067fe68e1c67c791f55b49d3fa6bde86b8d92afb192",
    "signature": "0x1ccfd7991a6af07ccc42cf62d45ec03dba18fff97ceabd4b278ff5f44b79de5d377484094be1e3af6fdd7546a20b67ffce39fb8a1d8174de491e60581421185b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}