{
  "manageEntity": {
    "action": "Save",
    "entityId": "314857",
    "entityType": "Track",
    "nonce": "0xf3ae8fce7635ca7fe160b57cc46e9f862c826b7dfc811f9a7111f7c9ee2a76e3",
    "signature": "0x0f9bba31205ad074e7fafd88c99d71b26b8a4dc7bd80cf15fc0219d677e4d46b3c48c95045fcc027aa08c50000a3f405c02a6ca0740f202697433b82221124891c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}