{
  "manageEntity": {
    "action": "Save",
    "entityId": "970058734",
    "entityType": "Track",
    "nonce": "0x8c58e4f0dc82f1eac64274bf0589a264eba9461f0ee09b6b629fdae964e73d55",
    "signature": "0x370cf272579b5fb85e1b0e3977bfbce5bab99cf7c3dd8bca4cf47a4ff11d1d9a0750176947c70e05f39aa7c5cd78da51611d8a6ff4dc074a0a0ace50ee31fc0f1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}