{
  "manageEntity": {
    "action": "Save",
    "entityId": "86274",
    "entityType": "Track",
    "nonce": "0x40180520a1c58a2e6eb7adab8e911168d62f125c8887a1473e2a59f83c2ecd21",
    "signature": "0xa5be240aff35cfc3787b66f92cf17a913153ac70bae57d8b73a48b07c1ec472b57c3c43e14191427911819b2558325a44c680b133c07a9081d034405bd0a74a81c",
    "signer": "0x4D11c3319e766BE8ad4bD57B7E1C96300e25bcd3",
    "userId": "261446337"
  }
}