{
  "manageEntity": {
    "action": "Save",
    "entityId": "51631",
    "entityType": "Track",
    "nonce": "0xdf7146dd6a17b2df1f668fac7cdbfae6e14ef73c27e0b00657f98325a6c26364",
    "signature": "0x186904ae11f65c44dd3f045c67eab46bb3bcb420fcedf6b4bf156f4281630f0d2f4c35eeed0f14a93b0e6b455a80af5cd461f63fd3198da46cbb295d5dd9153f1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}