{
  "manageEntity": {
    "action": "Save",
    "entityId": "684075205",
    "entityType": "Track",
    "nonce": "0xc1fbc1eadf06feccf00a4907560db9bf6f6cf8d01b7bbe98a83c25a1e6cab6b1",
    "signature": "0xad48a5ae6d97fee8224186dfee4bba07cd0c5129fb735b232594a91d28c752983e0580e38a773964f716057b38612cd0af30694399f4240c6c205381923d02011b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}