{
  "manageEntity": {
    "action": "Save",
    "entityId": "1377386686",
    "entityType": "Track",
    "nonce": "0x6c22dacd834df4150d45e08d4bbc401b391b8e5a128766b44e471b9900b72167",
    "signature": "0x1001cd4dee8d67efb73b5bcbdad12ff209a4b8b1d77ef0070798c5bc0a3f97c27b545b704dd74e9a2fee45254b6108f836bdaea5ccfd321f45481033579c1beb1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}