{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458078217",
    "entityType": "Track",
    "nonce": "0x3e1b46db8b6a02631af67abc697f58a3ee81572b48e327ca5eb67c87a960a54b",
    "signature": "0xcff0144a7b8ff1b922a74e46d46bcf42ba985057ec16ec5af442cb9e3e240a84722bb5695fceff5d9e1e3066ca722b108266a99c24b02d96e8f208e9aaccd2d91c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}