{
  "manageEntity": {
    "action": "Save",
    "entityId": "424693651",
    "entityType": "Track",
    "nonce": "0x7cdb421ebab7241266f1ec470d7e440bdfc9933700f86c9799d3fc89a8ccbf80",
    "signature": "0x1d373f79a0ac1299cd96c1663d3768848863e7e2592f3458621f70bf8373272a3be7ce3296581f0ab44c99fea353a3d4e28054b8db798db941618839074556e61c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}