{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058439967",
    "entityType": "Track",
    "nonce": "0x3bc87956b5e993a7265b40e40c917d364821253bacd61c5df4c73f98505ea208",
    "signature": "0x4f11660f83a536a5bdc22a930013d95a78e7393b68cf727cdb42cf43ced4f3012ed1ee6fcdfa82020476a5a2b5589a23de582940046a1c61d606df51511011311b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}