{
  "manageEntity": {
    "action": "Save",
    "entityId": "913092101",
    "entityType": "Track",
    "nonce": "0x57d4f9e39c4f669714deb6831877514d8c004db07c2ff642a793305a20565135",
    "signature": "0x2b4f14fe92a0b29a0304c42b6715975acf78497eeb3168fce9424cd85f900d3415127a1a75df77fbd5044ae85f7c426d756dfe80f67b95dd016e1b3fa4e619501b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}