{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040671",
    "entityType": "Track",
    "nonce": "0x00f8f67a599a1f2978a54ee1aa4d40403c02cd91033a9f472665979af57195f8",
    "signature": "0x31519382b9dcf9889483372a574a9ae012cedc2b0bf69e7111f4719ae532ecc86f7a9c7076700f002970a2abc5325cd0b2b4fc46d1fcdc18a9d6bb7a417b76d01b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}