{
  "manageEntity": {
    "action": "Save",
    "entityId": "1272536776",
    "entityType": "Track",
    "nonce": "0x8df83ed871669f3ee0500793d7ab00f0f167588938847611304ae71b46bc060d",
    "signature": "0x56e5dbcf64db17d0b317cd3bfc16331e509b11f0896e32bbf5f5385d14f0ca5064997e3bbefc020f9648eb5d28010409cd65654f5e370ad301a98c37a40ad8b81b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}