{
  "manageEntity": {
    "action": "Save",
    "entityId": "370236625",
    "entityType": "Track",
    "nonce": "0xc87550987f19e6538a1f14cf52970e2b17d9bba6c6e8051d5eca2893afaefe37",
    "signature": "0x17a40c78222e3831c30f738b5d4beb73b1c6fd440fda6fbfcc36167c82dbb7b151f8f10cf2679ad259790227e416ac1c18cfe8c82e41ef11e3e23a45e8783c491b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}