{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592375771",
    "entityType": "Track",
    "nonce": "0x4b8d385c026f05d5c409a47b01eec68b2aa83aaa6eb887cbeec95d095e9799d1",
    "signature": "0x7555101266a04c539d280ad4c6363e5dd373c7ffdf7813e0bc85077d75c05cb97d9078cd737efddbc8b6e8e987aff8245a268566b13d00b310fc3d4edde023301c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}