{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378551120",
    "entityType": "Track",
    "nonce": "0x5bdd3a5d6cea2ecde0b9ed2a61cf7769e5864bee2b3b51f1987331b359a1c970",
    "signature": "0x592ad8099cdf854bad9773d49074bcece8cf64ac2271b0316794725098a24d6e5e4eaf25596cca8e1ac64d3fb37b0acfccc06432086d0dcc3c508dd518823dc91c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}