{
  "manageEntity": {
    "action": "Save",
    "entityId": "542654",
    "entityType": "Track",
    "nonce": "0x05c4e33261b9f1f47e3dd76a4cc5468bcfd1de950b9f7c34540075a41a9c7c57",
    "signature": "0xe6741bda64e7dc25a0c759b3ea8661b15c54162027205685d268bd3dcfd129696b434c89e7499daef0e3c5f26a28a6a12ef5791246a74afd815f9222ff88b5df1b",
    "signer": "0x253047c0af4Fc72D6658Bc16df0b3FE0dB459513",
    "userId": "186198383"
  }
}