{
  "manageEntity": {
    "action": "Save",
    "entityId": "680220082",
    "entityType": "Track",
    "nonce": "0x2f4256bc2507b1753e226fd143bfcc068320b55ed23c29e756b0ca8f1529e72e",
    "signature": "0xcb3a7a7bae599cbd88576c121bb2a4d5d2936e3255f94260d578134cdec9b3c52fb18b7737dd574c2e29f045de4f6bfe77b1c38c03eeb046972eb3f577b44e0b1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}