{
  "manageEntity": {
    "action": "Save",
    "entityId": "545399",
    "entityType": "Track",
    "nonce": "0x76533caa02ae06d29b243130193a196b19cda4fe431a508d813771121774c3f5",
    "signature": "0xbdf83b201ed19299221dc053cd46cf4c22e9a2a56c8bc6c8e56f91e2113be57437805e0f39aebd8940921afd6c8e1259236f6a2dacf2f1d59d05fde9ee61c9171b",
    "signer": "0x0E6Ef8dF2F401D8918d603B82ef321D94A721556",
    "userId": "648802251"
  }
}