{
  "manageEntity": {
    "action": "Save",
    "entityId": "345616833",
    "entityType": "Track",
    "nonce": "0xd6ce75dd2473cae5cd4f2a2509ff1acbcd6becbaecbc082412ecb2fce9033ef2",
    "signature": "0x9eb10d058bd966a188e5be140e9f76e279235e22cab3923501bb0febd3ce15d5190355e67a91e065affe86135bd1c70af1353e2e283a777942e6b22d271ec7a51c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}