{
  "manageEntity": {
    "action": "Save",
    "entityId": "275075741",
    "entityType": "Track",
    "nonce": "0x2f7291df219c2794b7af045cca6ebc761cd9969fc12daa53bc65bce751dc3e63",
    "signature": "0xff674c435e642a070efac8241070e4e1084f6bdc4a7bcc8a432b98ceaee6638f74cf9166602a6565a72dd585e5afec2708a15dbc9fd01960f3564e5b274c05811b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}