{
  "manageEntity": {
    "action": "Save",
    "entityId": "1063423415",
    "entityType": "Track",
    "nonce": "0xec3a6d0064d6164419582c553356ed2263b3a42d7fecff34e2b238049fa5eead",
    "signature": "0x7333d4a7153e924f1eaf932a1f9760fa6a69ba3ed3c9a7f10baa95a022ae462d4c22de8fc0bd1c8c56e187521f2697514c12df571e72c263bc9811a615512e6d1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}