{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015065558",
    "entityType": "Track",
    "nonce": "0xaa1e28c90846656c8e882f764eb0a642dcc8a2ebe8a60607b3615a177166cb9a",
    "signature": "0xaa828e3ed699a8b93ae9f2126e21ab6f2821392bbbc1041dbb370bd6cae67e2c743415b6de93389ce557094d92c0f053fe7c6c7a6d16ced015fadbf3d17e0ac31c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}