{
  "manageEntity": {
    "action": "Save",
    "entityId": "984616",
    "entityType": "Track",
    "nonce": "0x46e5db09f5a7394814a36e50f233c81a0fd83bd2eaa0f60183c093a6d4ab65b2",
    "signature": "0x1cec03f11c4ebfa655c367be55df94608e8831202a548f9e0fffd7044f798bbf45e45e61aeaca2f565440db8dbdc3eeb2d0a1ef5f988a4d420c631364362436b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}