{
  "manageEntity": {
    "action": "Save",
    "entityId": "381939004",
    "entityType": "Track",
    "nonce": "0x51d469d580ece1b22d1b51a4989f5e084ae345ae624365e9e4f8b34ffe616514",
    "signature": "0x9113c3970412181fd37af8f239682d861e08e72fbb37baff73258dba1f778bad4ab960061c0a1ac97ea30db2ef18824c6871f97ecf5eee51df52dd1af45682d01c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}