{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108071424",
    "entityType": "Track",
    "nonce": "0xd43a6e057ab18d5d143505b1e7a029ee6bc3b4b00837468b15e657378f31fec6",
    "signature": "0x1f6a1718021d58f06e2a4fa602016e6075449d6e631b546700b7bf4bf690fb206d83ce2e20a8d95d3da25eb60cdfd588a50abad35fc51497b6b5a0aeadbe0b291b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}