{
  "manageEntity": {
    "action": "Save",
    "entityId": "183291712",
    "entityType": "Track",
    "nonce": "0x3794b47a45bbc5349bba3505194738d8563c05b34a5f8cff0f98405b70682751",
    "signature": "0xe4eddac51d1d742e240b7c8d74fd6d2ea98577eed341d51549c8b1ca947f1e7e4b20be4eaca5601954fc3bde5967cca7cde751cfc2c1f9fb8cb9fa6c356c78961c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}