{
  "manageEntity": {
    "action": "Save",
    "entityId": "986806203",
    "entityType": "Track",
    "nonce": "0x1d9d7654902ec77012cf621af2abbddf86f5e4a1370872e4141294a7ec94ff11",
    "signature": "0x3224aa45223a53ff2a4221d8f13487ac919ba45c8d971718f5bf04c4a412676d717bac16728c0d34823fc83e95b4a823d664c80d57908e4e8f89a38d76af5b7d1b",
    "signer": "0x9B305fd00d9a363195749eec4f162986083A6dC7",
    "userId": "648443373"
  }
}