{
  "manageEntity": {
    "action": "Save",
    "entityId": "803276679",
    "entityType": "Track",
    "nonce": "0x544e5b1f824b26a094322c6b3def1a2c927ec181618962554e561b9e18548c23",
    "signature": "0x7727b6ea12c60f6fb9882e0bb13987d826e4398856f4ec15f13a5efa739cc56666d3853bf4ceeb41baa62c93fa8f5b33c2e03887a04cefc17964d3701eaf160e1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}