{
  "manageEntity": {
    "action": "Save",
    "entityId": "1340214763",
    "entityType": "Track",
    "nonce": "0x6dfd5abcf93bd7a7630aa03cd3cda8e6cf6e29be860cec85e3eb0fbd56ba425c",
    "signature": "0x1e4dcf6540d53fa92c0573251b02008208f32d7673d3119d72a1c73ea087d3da20ebf9dfd455309a65c2f219350c54775cd59419cd5e026bdce827c3d251b9411c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}