{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098349710",
    "entityType": "Track",
    "nonce": "0x3a119cac64260181123c1e97b14563abbde8a89a065bab3131c437a99f90a922",
    "signature": "0xbe25871292ce5f19de638c8556f74f31e5439fcda8279494ea3f61eeaec0ea3a5f73e8fd8781e646a3d89694aad0fe3c57450acc431b0abd133fcfa63ad5aa911c",
    "signer": "0x8f0A5939761dE5f6b984a401d42E21b5B3023674",
    "userId": "925049268"
  }
}