{
  "manageEntity": {
    "action": "Save",
    "entityId": "2051319199",
    "entityType": "Track",
    "nonce": "0xf92d7b9974b906f620ed2a6307b507e06197b2b61fef19263fdd0c61deab507a",
    "signature": "0x49821004146e2b34bb79e716d109124e66dead0201b9c595ea4bd86ad2a872f95cbfa27584af7d564375bc1839c32440dd42970849d2d5a5aae3c29eaaabde8c1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}