{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766760077",
    "entityType": "Track",
    "nonce": "1790322588304092281",
    "signature": "0x577de0167a1f050cf65e764a065dac363aa78723d989d8961e258a77158d881d4dc67a1dc428625b53d0d2db187c7a4f40de0f7017875f3e3206f32379d250ea1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}