{
  "manageEntity": {
    "action": "Save",
    "entityId": "974380538",
    "entityType": "Track",
    "nonce": "0xe311598aa5a0ceaab4101d2ad09dac26652ab68a99bcb7c58027d99aa6b5bcb3",
    "signature": "0x478cc8d2b097f44558ff57e04044cb030922e9c4d0b780adc71bf1f2f3725af12a1f648613a1160a64e6af56fe53fff024962cfcbb8db970a188a0c47393eff31c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}