{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844699306",
    "entityType": "Track",
    "nonce": "0xecdfe543b9c49507fd5b198262ec1364115f080eb6a27bfd8bf3ed0a0b708453",
    "signature": "0x6ce52d46781ec4a3910624238252a0f72a4a1927b3412bf30146bf01fef72cbf40132150a929935a09ffa78925d5d8ce021b6c9619b900950b2f1ef7190102241b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}