{
  "manageEntity": {
    "action": "Save",
    "entityId": "252575",
    "entityType": "Track",
    "nonce": "0x188e5885a126267097c8349006dfc84568ef610f6582043515391396d3c6492b",
    "signature": "0xdf9de6739bbfc4e32f51d8847dd59e1018c0b00458824a88143023097b5ce37600eab8e60ba185500228db512eeb149cfc9197c370504e0e127cc82a2b859f1e1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}